PubMed Health⌕ Search

Biomedical subjects

R Gentaz

Publications and source records attributed to R Gentaz.

At least 19 recordsLinked to original sources
PubMed1991

[Oculo-orbital topometry studied by X-ray computed tomography in strabismic children].

Scanner examination of the oculo-orbital region of 20 squinting children shows, by mean of precise measures, in a first part abnormalities of orbital development (these abnormalities are always moderate). In a second part, this examination demonstrate asynergies of the horizontal oculomotor muscles, particularly an isolated hypermotricity of one medial ocular muscle in patent induction movements. Despite of irradiation of the crystalline lens this examination can be helpful in a preoperatory check-up.

Adolescent↗
PubMed1991

[Imbalance of the postural system studied by light stimulation in children with strabismus].

The postural displacements on a statokinesimetric plateform of squint-eyed children during short monocular lighted stimulations show that their postural regulation is different from that of normal children of the same age. The provoked amplification of the displacements is larger, their direction is no more systematized but once adopted it remain stable. The orthoptic treatment associated with prismus lenses and postural reeducation often allows to double their postural performances.

Adolescent↗
PubMed1988

[Madreporic, polarized total arthroplasties of the hip. Apropos of 2688 cases].

This paper reports an experience over ten years with cementless total hip arthroplasty in a series of 2688 personal cases commencing in 1975. Stress is laid on the results over a period greater than 5 years and up to 10 years as much on the long-term effects on the host bone as on the implant itself. The causes of failure of biological anchorage by endosteal osteogenesis are analysed. Various phenomena, particularly the reaction of the cortices to stress, several cases of bony resorption with debris due to wear and fatigue fractures of the stem of the prosthesis have been seen. These and the problems posed by the occasional need for extraction have led to the progressive development of the prosthesis, resulting in 1983 in a new type of anchorage with a polarised surface and a better-balanced prosthesis in relation to stress and extractability.

Adult↗
PubMedDate not supplied

[Posturographic study of total prostheses in the leg. Apropos of 88 patients examined].

By suppressing certain articular sensory receptors, the reconstructive surgery of joints using total prostheses modifies tonic postural activity and, by this means, alters the regulation of balance in the subjects of operation. This doubtless explains certain discrepancies between the apparently excellent results in respect of joint movement and muscle strength and poor utilisation of the joint in every day life (instability, use of sticks or failure to use the joint in walking). Drawing on the experience and basic work of specialists in posture, the authors have undertaken a study of tonic postural activity in patients who had received a total prosthesis in the lower limb, both from the clinical aspect and by graphic measurement using an electronic apparatus, the statokinesiometer. Fourteen normal subjects were tested to calibrate the apparatus and 8 patients suffering from established osteoarthritis of the hip were studied as controls. Analysis of tonic postural activity was made in 66 patients who had received total prostheses in the lower limb. The results showed significant disturbance in balance in ankle prostheses, minimal disturbance in knee prostheses and not significant disturbance in hip prostheses. Certain therapeutic implications are derived from this study.

Adult↗
PubMedDate not supplied

[Normal gait and its changes after total arthroplasty of the lower extremity. Study on 200 subjects of the support phase of the step and its impulse].

The authors have studied the normal gait of 50 individuals using a dynamometric platform. Measurements have been made of the impulse at each step, the weight bearing phase and the forces transmitted by the foot to the floor. The results have been compared with those obtained from a study of the gait of 150 patients treated by total prostheses (133 hips, 10 knees, 7 ankles). This type of study leads to a better appreciation of operative results.

Aged↗